Assessment of Water Quality from Selected Boreholes in Namanga Town, Kajiado Coun

Water is the most common substance to man. It exists in three forms, as vapour, liquid and solid. Water covers more than seventy percent of the earth and also it is present in the atmosphere. Water is also an essential requirement for all living things on earth. Most organisms are made up of water. Human being consists of about two-thirds water in their body mass.

Samples for analysis was collected from three different boreholes named main borehole, Mbaria water. Mbaria borehole is 90 meters deep and people buy water from there and some of them sell it to Namanga’s population. The third borehole is referred to as “China borehole” because it is the Chinese who drilled the borehole for the purpose of being used in construction. The Chinese are constructing East African Common Market in Namanga so they are using that borehole water in the construction and the only people who drink it are the construction workers.

 The following parameters were analyzed: pH, hardness, alkalinity, fluoride, electrical conductivity, total dissolved solids, nitrates, sulphates, chloride, sodium and potassium.

The main aim of the analysis is to determine whether each parameter checked falls within the range of NEMA and WHO standards. The purpose is to see whether these boreholes water are fit for human consumption.

After carrying out the test I found that all parameters in main and Mbaria borehole fall within the NEMA range but their concentration of each parameter in the water was very small. But china borehole parameters exceeded the other two boreholes by far but still felt within the range of NEMA. The only parameter which was very high above the WHO standards was nitrate.

Main borehole and Mbaria borehole are fit for Adult consumption but is not recommended for infants below the age of 6 months. But china borehole is not much recommended for human consumption because it has high level of fluoride, hardness, conductivity, total dissolved substance, alkalinity and nitrates.

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